from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An olive green, glasslike substance formed from the sand melted by the heat that was generated by the first nuclear blast at the New Mexico test site in 1945.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The glassy residue left on the desert floor after the Trinity nuclear bomb test of 1945.
After the Trinity Site in New Mexico, after Trinity, code name for the first atomic bomb test.(American Heritage® Dictionary of the English Language, Fourth Edition)
Trinity + -ite (Wiktionary)